A Lean Canvas is just the beginning. The real question is: how good is your business model?

After helping thousands of founders assess their canvases, I’ve developed a systematic framework for stress-testing business models. It evaluates your model across 7 critical dimensions.

The 7 Dimensions

1. Clarity

Can you articulate your business model in one sentence? Does everyone on your team understand who the customer is and what problem you’re solving?

Low clarity signs:

  • Multiple target customers with different problems
  • Features masquerading as value propositions
  • Vague problem statements (“make life easier”)

2. Desirability

Do customers actually want this? Not “would they say yes in a survey” but “will they take action to get it”?

How to test:

  • Problem interviews: Are they actively seeking solutions?
  • Offer tests: Will they sign up, pay, or commit time?
  • Competitor analysis: Are they already paying for alternatives?

3. Viability

Can you build a sustainable business around this? The math has to work.

Key questions:

  • Is your market large enough?
  • Can you achieve profitable unit economics?
  • What does your customer acquisition cost look like?

4. Feasibility

Can you actually build and deliver this solution? With your current resources, skills, and timeline?

Consider:

  • Technical complexity
  • Regulatory requirements
  • Partnership dependencies
  • Team capabilities

5. Defensibility

Once you succeed, can you defend your position? What’s your moat?

Defensive assets:

  • Network effects
  • Switching costs
  • Proprietary data
  • Brand trust
  • Regulatory barriers

6. Timing

Why now? What has changed that makes this the right moment?

Timing catalysts:

  • New technology
  • Regulatory changes
  • Social/behavioral shifts
  • Market maturity

7. Mission

Why do YOU care? Your personal motivation matters more than you think.

Mission alignment:

  • Can you stay committed for 5-10 years?
  • Does this align with your values?
  • Would you still work on this if it took twice as long?

How to Use the Assessment

Score each dimension 0-10. Be honest. Get external perspectives.

Scoring guide:

  • 0-3: Major concerns, needs significant work
  • 4-6: Some validation, but gaps remain
  • 7-9: Strong evidence, minor refinements needed
  • 10: Fully validated, no concerns

Then prioritize based on risk. A 3 in Desirability is more dangerous than a 5 in Defensibility. Fix the biggest risks first.

Common Patterns

After running thousands of assessments, I see these patterns:

The “Mixed Model” Multiple business models jammed into one canvas. Usually happens when founders can’t choose between B2B and B2C, or between two different customer segments. Solution: Split into separate canvases and validate each.

The “Solution in Search of a Problem” High Feasibility, low Desirability. The founder built something they could build, not something customers need. Solution: Get out of the building and do problem interviews.

The “Too Early” Model Good idea, wrong time. The enabling technology or market conditions aren’t ready. Solution: Identify the timing catalyst and decide whether to wait or pivot.

LEANSpark Assessment

This is exactly what LEANSpark does. Upload your Lean Canvas, and we run a systematic assessment across all 7 dimensions. We detect mixed models, generate focused variants, and tell you exactly what to validate next.

2 hours of stress-testing beats 2 months of guessing.

Ready to assess your model? Try LEANSpark.